| 释义 |
po·lar
I. \ˈpōlə(r)\ adjective
Etymology: New Latin polaris, from Latin polus pole + -aris -ar — more at pole
1.
a. : of, relating to, or situated in the vicinity of one of the earth's two poles
< valley glaciers in both polar and equatorial regions — Hugh Odishaw >
< Antarctica is the only polar continent — Antarctica >
b.
(1) : of, relating to, or suggesting the region around one of the earth's two poles
< polar weather >
< polar waste >
< polar night >
(2) : situated in, suitable for, coming from, or having the characteristics of the region around one of the earth's two poles
< polar air mass >
< polar flying >
< polar airplane >
< polar sea >
2.
a. : of or relating to one or more physical poles (as of a sphere or magnet)
< polar magnetism >
b. : having poles and as a result a property analogous to that of a magnet in that there is an associated directed line connecting the two poles at the ends of which line there are equal and opposite properties
< polar molecule >
3. : of, relating to, or like a polestar in serving as a guide
< polar principle >
< this polar idea provides the clue to both … systems — V.L.Parrington >
4. : diametrically opposite in nature, tendency, or action
< extreme and indefensible polar positions — Hunter Mead >
< for whom classicism and romanticism are not polar but continuous — Harry Levin >
< polar if not mutually hostile parties — Austin Warren >
5.
a. : electrovalent
b. : having a dipole
< polar compounds such as hydrogen chloride, ammonia, water >
< alcohols and ketones are common solvents >
6. : held to resemble a pole or axis around which all else revolves : pivotal
< the polar events of this informed study — Fraser Neiman >
II. noun
(-s)
: the secant of a conic through the points of tangency of the two tangents that can be drawn to the conic from an external point
III. adjective
1.
a. : passing over the north and south poles of a celestial body
< a satellite in a polar orbit >
b. : traveling in a polar orbit
< a polar satellite >
2. : of, relating to, or expressed in polar coordinates
< polar equations >
also : of or relating to a polar coordinate system |